Sealing Member and Mantle Comprising Such Member, Gyratory Crusher and Method of Installing

Abstract

The present disclosure relates to a sealing member for a gyratory crusher having a main shaft and a mantle. The sealing member includes a first side and a second, opposing, side and the first side is arrangeable on a circumference of an inner wall of the mantle of the gyratory crusher and at least a portion of the second side is at a distance from the first side, the distance being not less than the difference between a radius of the inner wall of the mantle where the sealing member is arrangeable and a radius of the outer wall of the main shaft where the sealing is to contact the main shaft for sealing a space between the mantle and the main shaft. The sealing member provides an efficient and safe way of installing a mantle of a gyratory crusher.

Claims

1-15. (canceled)

16. A mantle for a gyratory crusher comprising a sealing member, the sealing member comprising a first side and a second, opposing, side, wherein the first side is arranged on a circumference of an inner wall of the mantle of the gyratory crusher, and at least a portion of the second side is at a distance from the first side, the distance being not less than the difference between a radius of the inner wall of the mantle where the sealing member is arranged and a radius of the outer wall of a main shaft of the gyratory crusher where the sealing member is to contact the main shaft for sealing a space between the mantle and the main shaft.

17. The mantle according to claim 16, wherein the first side of the sealing member is arrangeable on the inner wall of the mantle by means of adhesion.

18. The mantle according to claim 17, wherein the first side of the sealing member comprises an adhesive.

19. The mantle according to claim 16, wherein the sealing member is made of a flexible material.

20. The mantle according to claim 19, wherein the flexible material is a thermoplastic elastomer.

21. The mantle according to claim 19, wherein the flexible material is a polyurethane.

22. The mantle according to claim 16, wherein the sealing member comprises a void.

23. The mantle according to claim 16, wherein the sealing member has a width, w, of 20-100 mm, and at least a portion of the sealing member is of a thickness, t, of 10-50 mm.

24. The mantle according to claim 16, wherein the sealing member is arranged at a lower end of the mantle.

25. A gyratory crusher comprising a main shaft and a mantle, wherein the mantle comprises a sealing member comprising a first side and a second, opposing, side, wherein the first side is arrangeable on the circumference of an inner wall of the mantle, and at least a portion of the second side is at a distance from the first side, the distance being not less than the difference between a radius of the inner wall of the mantle where the sealing member is arrangeable and a radius of the outer wall of the main shaft where the sealing member is to contact the main shaft for sealing a space between the mantle and the main shaft.

26. The gyratory crusher according to claim 25, wherein the first side of the sealing member is arranged at the inner wall of the mantle by means of adhesion.

27. The gyratory crusher according to claim 25, wherein the sealing member is made of a flexible material.

28. The gyratory crusher according to claim 25, wherein the sealing member comprises a void.

29. A method of installing a gyratory crusher comprising a main shaft, a mantle, and a sealing member comprising a first side and a second, opposing, side, wherein the first side is arrangeable on the circumference of an inner wall of the mantle, and at least a portion of the second side is at a distance from the first side the distance being not less than the difference between a radius of the inner wall of the mantle where the sealing member is arrangeable and a radius of the outer wall of the main shaft where the sealing member is to contact the main shaft for sealing a space between the mantle and the main shaft, the method comprising the steps of: arranging the sealing member at the inner wall of the mantle; lowering the mantle over the main shaft whereby the sealing member provides a centering of the mantle with respect to the main shaft, and seals a gap between the mantle and the main shaft thereat; and adding backing material between the main shaft and the mantle.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The invention will be described in more detail and with reference to the appended drawings in which:

[0025] FIG. 1 is a schematic cross-sectional view of a gyratory crusher as known in the prior art;

[0026] FIG. 2a is a schematic view of an embodiment of a sealing member according to a first aspect of the invention;

[0027] FIGS. 2b and c are schematic cross-sectional views of a second and third embodiment, respectively, of a sealing member according to an aspect of the invention.

[0028] FIG. 3 is a schematic view of a mantle comprising a sealing member according to an aspect of the invention; and

[0029] FIG. 4 is a schematic view of a gyratory crusher comprising a mantle with a sealing member according to an aspect of the invention.

DESCRIPTION OF EMBODIMENTS

[0030] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplifying embodiments of the invention are shown. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and to fully convey the scope of the invention to the skilled addressee. Like reference characters refer to like elements throughout.

[0031] FIG. 1A shows a part of a prior art gyratory crusher 100 comprising a mantle 1. The mantle is centralized around a main shaft 3 by means of wedges 4 arranged between the outer wall of the main shaft 3 and the inner wall of the mantle 1. Generally, four wedges 4 are provided, evenly distributed around the circumference of the outer wall of the main shaft 3. A mantle 1 of this kind can typically weigh 5 to 13 tons. The wedges 4 are installed between the outer wall of the main shaft 3 and the inner wall of the mantle 1 manually, i.e. by hand, while the mantle is supported by a hydraulic or other supporting or lifting tool. Considering the weight of the mantle, the manual installation of the wedges is, apart from being time consuming, to be seen as a task of considerable risk.

[0032] FIG. 2a shows an embodiment of a sealing member 10 for a mantle according to a first aspect of the invention. The sealing member 10 comprises a first side 11 and a second, opposing side 12. The first side 11 is substantially flat, providing a surface which can be arranged against another substantially flat surface. The first side 11 is arrangeable on the circumference of an inner wall of a mantle of a gyratory crusher. In an embodiment of the sealing member 10, the first side 11 comprises an adhesive for adhering to a surface, e.g. the inner surface of the mantle of a gyratory crusher.

[0033] The second side 12 comprises a protrusion 13 arranged on one end of the second side 12. In the shown embodiment, the protrusion 13 has a void 14, the void 14 yielding a p-shaped cross-section of the sealing member 10. The void 14 allows the protrusion 13 to adapt to different spaces, allowing for the sealing member 10 to adapt to a variety of spaces and still giving efficient sealing. The protrusion 13 is not restricted to the end of the second side 12, but could instead be arranged at a central portion of the second side 12 of the sealing member 10. An example of a protrusion being arranged centrally on a second side 42 is shown on FIG. 2b. The outer shape of the protrusion may be any shape, which is suitable for sealing, such as rectangular a rectangular shape as shown on FIG. 2c. The protrusion may also comprise a ribbed portion 53 at an end surface thereof, see FIG. 2c. A skilled person realizes that other shapes or cross sections of the sealing member 10, are possible within the inventive concept. For example, the sealing member 10 may have a D-shaped cross-section. It is also possible, within the inventive concept, that the entire second side 12 protrudes with respect to the first side 11 and that there is at least one void 14 between the first side 11 and the protruding second side 12. The protrusion 13 presents the largest thickness, t, of the sealing member 10, with the protrusion being adapted to the gyratory crusher it is to be used with. Generally, the thickness is in the range of 10-50 mm. As a further example only, the largest thickness of the sealing member 10 is 20-30 mm.

[0034] The sealing member 10 is elongated in a longitudinal direction and can be adapted to match the length of the circumference of an inner wall of a mantle of a gyratory crusher. The width, w, of the sealing member 10 is generally significantly smaller than the length. As an example only, the width may be in the range of 30-100 mm.

[0035] The sealing member 10 is made of a flexible material to allow a certain degree of elastic deformation of the sealing member 10, to allow for the sealing member 10 to adapt to a space in between which it is arranged. Typically, the flexible material is a thermoplastic elastomer, e.g. a rubber. Other flexible materials may also be suitable for the sealing member 10 and are thus possible within the inventive concept.

[0036] FIG. 3 shows a mantle 20 of a gyratory crusher according to a second aspect of the invention. The mantle 20 is generally cone-shaped and comprises an upper end 21 and a lower end 22. The mantle 20 further comprises an outer wall 23 and an inner wall 24. In the shown embodiment, at the lower end 22 of the mantle 20, the inner wall 24 comprises a protrusion 25. The mantle 20 further comprises a sealing member 10 arranged at the protrusion 25 of the inner wall 24. The sealing member 10 comprises a first side 11 and a second, opposing side 12. The first side 11 is arranged at the circumference of the protrusion 25 of the of the inner wall 24 of the mantle 20. The second side 12 comprises at least a portion protruding from the first side 11, which protruding portion 13 comprises at least one void 14. The first side 11 of the sealing member 10 is arranged at the inner wall 24 of the mantle 20 by means of an adhesive agent suitable for providing a bond there between.

[0037] FIG. 4 shows a part of a crusher 110 comprising and mantle 20 and a main shaft 30. The main shaft 30 comprises an outer wall 31. The mantle 20 is arranged around the main shaft 30 such that the inner wall 24 of the mantle 20 is facing the outer wall 31 of the main shaft 30. The dimensions of the mantle 20 are such that a space 33 between the inner wall of the mantle 24 and the outer wall 31 of the main shaft 31 is present. For correct functioning of the gyratory crusher 110, the space 33 needs to be homogeneous around the circumference of the main shaft 30. Positioning of the mantle 20 has been found to be greatly facilitated by the use of the sealing member 10 herein disclosed. The sealing member 10 comprises a first side 11 arrangeable on the inner wall 24 of the mantle 20, and a second opposing side 12. At least a portion of the second side 12 is at a distance from the first side 11 which is not less than a distance between the inner wall 24 of the mantle 20 and an outer wall 31 of the main shaft 30 of the mounted gyratory crusher 110, thereby sealing the space 33 there between. The sealing member 10 is sufficiently rigid to provide a centralizing of the mantle 20 around the main shaft 30. It is furthermore sufficiently flexible to adapt to a space between the main shaft 30 and the mantle 20, the space may be of a dimension slightly smaller than the largest thickness of the sealing member 10. The deformability of the sealing member 10 will compensate for any tolerances between the mantle and the main shaft. If the two parts are manufactured to match one another perfectly, the protrusion 25 could act as sealing and centralizing member. However, perfect manufacturing is not possible in most cases, therefore the sealing member 10 can be used to compensate for the tolerances of the two parts.

[0038] The skilled person realizes that a number of modifications of the embodiments described herein are possible without departing from the scope of the invention, which is defined in the appended claims.